Corrosion performance of zinc chromate (hexa:tri Cr) complex compound coating on zinc-coated components

被引：0

作者：

Hamid, NHA ^{[1
]}

Hamzah, EB ^{[1
]}

机构：

[1] Univ Teknol Malaysia, Fac Mech Engn, Dept Mat Engn, Skudai 81300, Johor, Malaysia

来源：

DAMAGE AND FRACTURE MECHANICS VI: COMPUTER AIDED ASSESSMENT AND CONTROL | 2000年 / 6卷

关键词：

D O I：

暂无

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

Zinc chromate complex compound is a thin coating formed through a passivation process produced by a chemical or electrochemical treatment of a metallic surface that gives a superficial layer. This layer which is actually a compound of the metal gives corrosion protection and has a profound influence on the properties of the coating. The chromate film was produced from chromating liquid which consists of three different chemical compositions comprising of chromic ions (hexa & tri Cr) and acids. The zinc plated steel sheet were then immersed in the solution and approximately 0.5-3.0 mum thick chromate film was formed on the metal sheet surface. It was found that pH value and immersion time have a significant effect on the corrosion resistance of the chromate layer. The microstructure analysis and corrosion rating in accordance to BS/ISO was conducted. The chemical reaction of the phenomena was also discussed. The newly blended formulation gives the best corrosion performance in comparison with a proprietary product used commercially.

引用

页码：601 / 607

页数：7